Riveting mechanism



y 1943- s. BLOOMFIELD RIVETING MECHANISM Filed Feb. 2, 1942 3 Sheets-Sheet l FIqCZ F1 4 3 SAM BLOOMFIELD May 4, 1943. s. BLOOMFIELD RIVETING MECHANISM Filed Feb. 2; 1942 3 Sheets-Shet 2 INVENTOR. BY 3AM BLOOMFJELD aw if Patented May 4, 1943 UNITED -sTATEs PATENT OFFICE 2,318,191 RIVETING MECHANISM Sam Bloomfield, Wichita, Kans. Application February 2, 1942, Serial No. 429,253

4 Claims.

relates to a riveting mechanism principal object a magnetically My invention and has for its controlled dolly responds to a magnet at the time of moving the sheets to drill apertures through the sheets or rivet the same together, the magnet being on one side, the dolly block on the other side of the aluminum sheets, it being understood that the dolly block and maEnet are brought substantially in registry at the time the magnet is moved, the riveting being accomplished by a pneumatic tool of a conventional type, and furthermore the operation of riveting being performed by one mechanic to reduce the cost of operation.

A further object of my invention is to provide an electro-magnet that may be controlled by a switch and a resistance to reduce magnetic power to eliminate excess friction at the time moving the mechanism, while in the event of employing permanent magnets, a means is provided to disengage a portion of the magnets from contact with the aluminum sheets, whereby magnetic attraction is reduced to avoid excess friction while moving the mechanism irom one point of action to another along the aluminum being riveted together, it being understood that aluminum is void of magnetic attraction while the magnetic power will attract the dolly block through the sheets to retain the same to snug engagement during the process of riveting.

A still further object of my invention is to provide a riveting mechanism that is comprised of two members, one of which is a magnet while the other member is a dolly block controlled by the magnet, whereby said dolly block may be moved whenthe structure of a fuselage, or the like, is congested with respect to space in which the dolly block must engage, and being moved therein by magnetic attraction as the magnet is moved alon the exterior of the sheets that are being riveted together.

A still further object of my invention is to provide ball casters for the magnet and dolly block, the balls being socketed in the body of each thereof to engage with their respective sides of the the balls being spring tensioned to carry their respective members slightly spaced from the aluminum sheets when the magnetic power is reduced to avoid a drag of each member's surface at the time of moving the mechanism along-the sheets.

A still further object of this invention is to simplify the construction of each member or the riveting mechanism to economize its production and. to simplifythe operation so that one mechanic as above stated may efliciently accomplish the riveting of the aluminum sheets together and the magnetic attraction to compress said sheets to snug engagement during the process of setting the rivets.

block, the movement of which v with respect to These and other objects will hereinafter be more fully explained, reference being had to the accompanying drawings forming a part of this specification, and in which like characters will apply to like parts in the different views.

Referring to the drawings:

Fig. l is a sectional edge view of aluminum sheets having the members of the mechanism oppositely positioned on the sides of the sheets.

Fig. 2 is an outer side view of the dolly block its position on the aluminum sheets, while Fig. 3 is an inner side view or said block.

Fig. 4 is an outer side view of the magnet while Fig. 5 is an inner side view or said magnet with respect to its position of engagement on the aluminum sheets.

Fig. 6 is an enlarged edge view of the magnet, and the dolly block, each of which is partly in section.

Fig. 'l is a plan view or the magnet fragmentarily, the head enclosure being removed.

Fig. 8 is a sectional view through the dolly block modified for drilling purposes.

Fig. 9 is a sectional view through the dolly block modified to secure a channel to a lapped portion of aluminum sheets. a

Fig. 10 is a sectional view of the dolly block modified to accommodate for the length 0! screws when the screws are used to secure the aluminum sheets together.

Fig. 11 is a wiring diagram for the electromagnets.

Fig. 12 is a plan view magnet arrangement.

Fig. 13 is a transverse view of Fig. 12, while Fig. 14 is the other side view of Fig. 12.

Fig. 15 is a plan view or the permanent magnet, having its head enclosure removed.

Fig. 16 is a sectional view taken on line l6-l6 in Fig. 15.

The invention herein disclosed relates to a magnet and a dolly purpose.

The magnet consists of a casing comprised of side walls I, said casing having a centrally disposed cylindrical wall A whereby an opening A extends through the casing, the casing otherwise being hollow and having a bottom B and a removable head 2 as an enclosure for the casing, said casing being made of nonmagnetically controlled material.

Positioned in the hollow of the casing is a plurality of electro-magnets 3, each being of a conventional type and being equal in length to the depth of the casing between its head and bottom, said bottom being bored axial for each magnet of one side of a permanent and through which the core of the electro-magnet will extend and being flush with the outside ot the bottom to engage with aluminum sheets 4, while the end 01 the electro-magnet body seats block coacting for riveting on the bottom of the casing. The attraction of of a coil spring 20, the other end of the spring the electro-magnets passing through the sheets engaging with the inner side of a disc 2| that is controlling means for a dolly block later dethreadedly engages in the outer end of the bore scribed, said electro-magnets each being 0011- by which means the spiing is tensioned toward nected to feed wires 5 that are supplied with a the bucking head to function as a cushion for the source of electric current to energize said elecjai-xof the pneumatic tool, t e cushion being tro-magnets simultaneously means to avoid displacement of the dolly block Positioned in the hollow of the casing in workbody from its respective side of the aluminum ing relation to the electro-magnets is a switch sheets when the tool is in operation, it being un- 6 to vary the magnetic power of the electro-magl0 derstood that the magnetic attraction of the nets, the switch having a rockable lever 1 to conmagnet block is means to ietain the body of the nect the current direct through the magnets and dolly block to close engagement with the sheets also to conduct the current through a resistance and substantially in registry with the magnet 8 to reduce the power of magnetism eliminatstructure as the said dolly block structuie of dolly block to the opposite side of the aluminum follow closely therewith.

sheets, and place said sheets to snug engagement go It will also be seen that adjacent each corner for riveting purposes later described. of the dolly block body is positioned a similar ball Positioned near each cornei of the magnet cascaster and tensioning means therefor as heretoby a spring 10, one end of which seats in acavity against the balls similar to that provided for the of a piston-like element II that is forced to en casters of the magnet. When the current is reend of the bore adjacent the ball is contracted slightly from the said sheets and when the said of the bore, by which means the spring is teneach other and to snug engagement with the their sioned toward the ball which in turn will resist 5 respective sides of the aluminum sheets to resist th magnetic attraction proportionately when the pulsative movement of the pneumatic tool the resistance 18 employed to move the magnet When the edges of the aluminum sheets are to will cause the same to respond in like manner centrally positioned to straddle the joint, while as described for the magnet. the shaft 23 transversely extending w ll function A convenient means to manipulate the magnet as a. flange to stifien the cleat longitudinally. In structure is through the medium of ahollow hanthis mode of assembly there is provided on the die l3 threadedly engaging in a nipple It inface of the dolly block a channel 24 diametrically is also provided a main line control switch #5 pofrom the bottom of the depression to provide room sitioned in the feed line to make and break the for a head of a rivet that is formed by setting the current for the said electro-magnets same, it being understood that the dolly block is the thumb of an operator, or otherwise at his same direction. option. The said cylindrical opening through It will alsobe seen that when the sheets or the casing above referred to is for the conaluminum overlap at their marginal edges as opening being suflicient to encompass a plurality the dolly block to receive the legs slidable therein,

which the insertible end of the rivet pin l9 will In Fig. 10 is illustrated a pair of aluminum running fit, and being retained therein by a pair With the dolly block.-

of segmental flanges .13) extending inward of the To drill apertures through lapped sheets of alubore and oppositely disposed therein, one end of minum, there is provided a wood block 28 fitting the head being bored to form a seat for one end snugly in the race of the bucking head coinciding therewith peripherally, the head and adapted drill bit 29 as well as preventing said sheets from bending inward toward the head as the drill bit enters the sheets, said block being replaceable when multilated by repeated drilling. It will also be understood that the magnet will be employed in each performance illustrated in Figs. 8, 9, and 10, the magnet being omitted from said views, but essential to support the dolly block for each performance set up in said views.

In Figs. 12 to 16, inclusive, is illustrated an arrangement wherein permanent magnets are employed, the structure consisting of a casing rectangular in form, and having a rectangular opening H centrally passing therethrough, the body having side and end walls 30 and 3 i, respectively, externally, and side and end walls 32 and 33, respectively, internally, said walls having a bottom 34 integrally joined thereto, whereby the structure is channel li removable head 35 to close the channel. A plurality of permanent magnets 36 are positioned in spaced relation in the oppositely disposed side channels, said magnets being assembled on their respective shafts 31 and 38 in such a way that the legs of the magnets will extend through opening J in the bottom of the channel. The shafts are iournalled in the outer end walls 3| and adapted to turn in all of the magnets except the magnet at each outer end of each assembly, the latter named magnets being secured to the shafts and rockable therewith, the other magnets being permanently carried by screws 39 passing through the head and into the magnets at their upper extremity. It will be seen that shaft 31 outwardly extends through one end wall and has a crank 40 secured thereto as rocking means for the shaft-and magnets carried thereby, the other shaft 38 being rocked through the medium of a connecting arm 4| that has ends hingedly connected to cranks 42 and 43 respectively that are mounted rigidly on shafts 31 and 38, respectively, as shown in Figs. and 17, whereby the said outer positioned magnets at the ends of their respective shafts are rocked from engagement with their respective leg openings to reduce magnetic power of the magnet assembly for the purpose or reducing friction when the magnet is moved, the function being the same as described for the electromagnets, it being understood that the casing of the permanent magnet arrangement has similar casters positioned in each corner thereof.

And other modifications may be employed as lie within the scope of the appended claims.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a riveting mechanism, a dolly block and an electric magnetized structure to coact as means to secure interlapping aluminum sheets to snug engagement, said dolly block comprising a bucking head and means to cushion the same in the body oi the dolly block, the magnetized structure being hollow and having a bottom and head oppositely disposed to enclose the hollow, said bottom and head having an opening centrally passing therethrough to register with the cushioned bucking head whereby rivets may be inserted through the said interlapping portions of the sheets and set by a pneumatic riveting tool operating through said opening, and means e in cross section, and having a V for the electric magnetized structure to vary the power of magnetic attraction for the purpose specified.

2. In a riveting mechanism comprising a dolly block and an electric magnetized structure to coact as means to secure interlapping aluminum sheets to snug engagement, a bucking head and means to cushion the same in the body oi the dolly block, the electric magnetized structure being hollow and having a bottom and head oppositely disposed to enclose the hollow, said bottom and head having an opening centrally passing therethrough to register with the cushicned bucking head whereby rivets are insertible through the said interlapping portion of the sheets and being set by a pneumatic riveting tool operating through said opening, means to vary the power of electro-magnetic attraction, spring tensioned balls to function as casters for the electric magnetized structure, and similar casters for the dolly block so that when the magnetism is reduced the casters will carry their respective magnetized structure and dolly block bodies from engagement with the aluminum sheets, in which instance, the dolly block will respond to movement of the electric magnetized structure along said aluminum sheets to a point for riveting engagement, at which time, the said body portions are brought to snug engagement with said aluminum sheets when the magnetism is energized to its maximum strength.

3. In a riveting mechanism, a dolly block having a bucking'head and means to cushion the same carried by the block, an electro-magnet structure to coact with the dolly block, electric current regulating means for the current of the electro-magnet structure and electric power means to energize the electro-magnet structure, the dolly block to engage on one side of aluminum diets and the electro-magnet structure to engage on the other side as moving and retaining means for the dolly block to snug engagement with the aluminum sheets, the electro-magnet structure having an opening passing therethrough and ranging toward the dolly block, said opening being an accessible means through which to insert rivets in aluminum sheets and set the same by a pneumatic riveting tool.

4. In a riveting mechanism, a dolly block having a bucking head and means to cushion the same carried by the block, an electro-magnet structure to coact with the dolly block, electric current regulating means for the electro-magnet structure and electric power means to ener gize the electro-magnet structure, the dolly block to engage on one side of the aluminum sheets and the electro-magnet structure to engage on the other side as moving and retaining means for the dolly block to snug engagement with the aluminum sheets, the electro-magnet structure having an opening passing therethrough and ranging toward the .dolly block, said opening being an accessible means through which to insert rivets in said aluminum sheets and set the same by a pneumatic tool, a plurality of casters positioned in the dolly block and in the magnet structure to reduce frictional engagement when the magnet structure is moved and the dolly block responding to the movement for registry with each other.

SAM BLOOMFIELD. 

